Red-colored "anything" attracts hummers. Seems there are number of red-colored flowers that they strongly favor. Examples that come to mind includes the Cardinal flower (Lobiellia cardinalis), trumpet vines, and honeysuckle are just a few of many.
Once they come visit, and you regularly serve them up right, their denizens will arrive, limited by how much nectar you can supply!
Dude......stop.
ROTFLMAO X INFINITY
-------------------- "A man will heedlessly charge a cannon, but puke at the sight of 6 inches of steel." Jim Bowie